Sampling device



my 9 W50 c. W. cox 2,509,264

SAMPLING DEVICE Filed June 15, 1948 w. t '1 32 22 5 6 k I: Y \E i 18-33\ .l 5 M i; i 44 I i l :1 45 I 1: 3b

JNVENTOR.

CHARLES W COX i 'atented May 30,

UNITED STATES PATENT oFFlcti SAMPLING DEVICE Charles W. Cox, St. Albans,W. Va., assignor to American Viscose Corporation, Wilmington, Del., acorporation of Delaware Application June 15, 1948, SerialNo. 33,061

4 Claims. 1

This invention relates to sampling devices and is particularly concernedwith a device adapted to take samples of a fluid medium, such as ofvapor or gas, or of suspended materials within a gasous or vaporousfluid medium. Such suspended materials may be dust particles, pigments,fibers, grains, sand, gravel, and other particulate materials, such aswood flour, sawdust or other fillers used in the plastic industries.Thus, the sampling device is applicable to numerous industries includingtextile industry for sampling fibers, the food industry for samplingcereal grains, the plastics industries for sampling fillers, and whatnot.

It is a particular object of the invention to provide an apparatus fortaking samples automatically at definite intervals so as to providerepresentative selections of the material. A further object of theinvention is to provide a sampling device which is capable ofwithdrawing automatically or withdrawing at intervals representativesamples from a flowing stream of the fluid or fluid suspension. Otherobjects and advan- .tages of the invention will be apparent from thedrawing and the description thereof hereinafter.

In the drawing, illustrative of the invention Figure 1 is a plan view,in somewhat diagrammatic form showing one embodiment of the appilcationas applied to the sampling of a fiber suspension,

Figure 2 is an elevation of the embodiment of Figure 1,

Figure 3 is an enlarged sectional view, on line III-411 of Figure 1, ofthe sampling device itself,

Figure 4 is a diagrammatic View in elevation of a modified arrangement,and

Figure 5 is a diagrammatic view in elevation of a second modifiedarrangement.

Figures 1 to 3 show the sampling device installed upon a fiber-conveyingsystem such as is used in the textile industry for taking fibers from adryer and delivering them to a packaging system, such as a baling press.Such fibers may be natural or artificial, such as cotton, wool, silk,rayon, nylon, saran, etc. In the installation shown, the fibers proceedthrough the discharge duct 3 coming from the dryer or other source offiber to a rotary condenser 4 from which the fibers are dischargeddownwardly into the hopper 5 of a baling press or other receivingsystem. The duct 3 may flare out as at 3a as it approaches the condenser4. To effect deposition of the fibers upon the condenser, suction isapplied to a duct 6 which communicates by means of ducts l with the endchambers 8 of a conventional rotary condenser. In such a condenser, thesuction in the end chambers exerts its influence upon the interior ofthe perforated drum of the condenser along the portion of its peripherupon which the fiber-conveying stream firstmakes contact. Suitableradial partitions within the perforated drum and fixed diaphragms at theends of the drum are provided upon conventional condensers for thispurpose and will not be described.

In order to take a representative sample from the fiber suspension as itproceeds to the condenser, a branch duct 9 is connected with duct 3 andpreferably extends away from duct 3 in the direction of flow of thefibers therethrough, such direction being at an angle as shown. The duct9 opens at l0 into the cylindrical housing ll of the sampling device.The sampling device is preferably disposed in a vertical dispositionthough it may be inclined thereto if desired and the opening [0 isgenerally spaced a substantial distance from the bottom of the cylinderH. The lower end of the cylinder H is closed by a readily removable cap12 and the upper end is similarly provided with a cap l3. A duct I4 isconnected to the suction duct 6 and to the cylindrical housing II at apoint between the connection ID and the cap [3.

Within the housing ll there is provided a plunger or piston 16 which hasa tight sliding fit within the inside wall of the housing H. The head orbase of the piston is constituted of, or provided with an insertconstituted of, a fluidpervious separator, such as a screen or filterIS. The separator i5 is preferably spaced back of the outer edge of atapering annular rim ll projecting from the head and provided for thepurpose of pushing downward any fibers that may be partway within thehousing II and partway within duct 9 as the edge of rim ll passes overthe opening Iii. The skirt of plunger I6 is provided with a slot [tawhich registers with the opening of duct l4 into cylinderl 1.

Means is provided for reciprocating the plunger l6 within the cylinderII and such means may advantageously take the form of the hydraulic orpneumatic cylinder l8 suspended by means of a cross pin or rod W at theupper end of the cylinder H. A piston 20' within cylinder I8 isconnected by a rod 2| with the head of the plunger such as by the nut2|. Pipes 22 and 23 respectively are provided to introduce air, liquidor the like in the opposite ends of the cylinder 18 to reciprocate thepiston 20 and the plunger 16 one

